diff --git a/Python/etc/network/interfaces b/Python/etc/network/interfaces
index 7e14733..1d66bb0 100644
--- a/Python/etc/network/interfaces
+++ b/Python/etc/network/interfaces
@@ -24,7 +24,7 @@ iface %(interface)s inet static
     gateway 138.231.136.4
     dns-nameservers 138.231.136.10 138.231.136.9 138.231.136.3
     dns-search crans.org""" % { 'interface': interface, 'ip': pubip() }
-    else:
+    elif mode == "adm":
         print """auto %(interface)s
 iface %(interface)s inet static
     address %(ip)s
@@ -34,6 +34,24 @@ iface %(interface)s inet static
     mtu 1496
     dns-nameservers 10.231.136.10 138.231.136.9 10.231.136.3
     dns-search adm.crans.org""" % { 'interface': interface, 'ip': admip() }
+    elif mode == "radin":
+        print """auto %(interface)s
+iface %(interface)s inet static
+    address %(ip)s
+    network 10.42.0.0
+    netmask 255.255.0.0
+    broadcast 10.42.255.255
+    mtu 1496""" % { 'interface': interface, 'ip': radinip() }
+    elif mode == "accueil":
+        print """auto %(interface)s
+iface %(interface)s inet static
+    address %(ip)s
+    network 10.51.0.0
+    netmask 255.255.0.0
+    broadcast 10.51.255.255
+    mtu 1496""" % { 'interface': interface, 'ip': accueilip() }
+    else:
+        raise NotImplementedError, "Mode de réseau inconnu : %s" % mode
 
     for line in additionnals:
         print "   ", line
diff --git a/etc/python/ip.py b/etc/python/ip.py
index 0732bcb..b7e364c 100644
--- a/etc/python/ip.py
+++ b/etc/python/ip.py
@@ -19,3 +19,15 @@ def pubip():
 
 def admip():
     return admipof(hostname)
+
+def radinip():
+    if hostname == 'sable':
+        return '10.42.0.1'
+    else:
+        raise NotImplementedError, "Ce serveur n'a rien à faire sur le VLAN radin"
+
+def accueilip():
+    if hostname == 'sable':
+        return '10.51.0.1'
+    else:
+        raise NotImplementedError, "Ce serveur n'a rien à faire sur le VLAN d'accueil"